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Valves-1 / Engine
Valves-2
Car Engine Valves and Valve Train Problems This
category contains featured questions as
examples. They relate to most vehicles.
Question:
1992 Mitsubishi Diamante V6
DOHC mileage: 110,000. I was told my
car needed the valve seals in the engine
replaced, and my husband wants to do the
work himself. The problem is we can't
find a repair manual or any other info to
help him. Can you help us find any
kind of manual, video, etc. for my car?
Can you give me any advice on any of the
above to replace the valve seals and/or
rebuild the whole engine? Any
help you can provide will be greatly
appreciated because if my husband can do
this work himself it will save us at least
$1500.
Answer: If you are
considering rebuilding your engine, we would
suggest getting an already rebuilt engine
and “swapping” it for yours. To
replace the valve stem seals, remove the
cams and apply air pressure in the spark
plug hole to hold the valves up. Next,
remove the valve keepers and retainers to
expose the seal. Replace as needed to
reassemble.
Question: 1993 Geo
Metro 3 cylinder, mileage: 119,000. Changing
valve stem seals, do I have to remove the
head to remove the valve spring? The valve
spring is not exposed its down in the head
so a regular valve spring compressor cannot
grab the spring. Can I push on the spring to
remove it as is or do I have to remove the
head to get to the seal. Is there a special
tool I can use to get it out without
removing the head? Trying to do it myself.
Answer: No the head
does not need to be removed to replace the
valve stem seals. After removing the spark
plugs, apply air pressure to the cylinder of
the seals to replace. This keeps the valve
up while removing the springs and seals. The
springs are small and can be pushed by hand
or by using a pry bar.
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